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TK11250A Datasheet(PDF) 1 Page - TOKO, Inc

Part # TK11250A
Description  VOLTAGE REGULATOR WITH ON/OFF SWITCH
Download  34 Pages
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Manufacturer  TOKO [TOKO, Inc]
Direct Link  http://www.toko.com
Logo TOKO - TOKO, Inc

TK11250A Datasheet(HTML) 1 Page - TOKO, Inc

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January, 1996 TOKO, Inc.
1-4-96
TK112xxA
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
s High Voltage Precision at
± 2.4%
s Active High On/Off Control
s Very Low Dropout Voltage 80 mV at 30 mA
s Very Low Noise
s Very Small SOT-23L or SOT-89-5 Surface Mount
Packages
s Internal Thermal Shutdown
s Short Circuit Protection
APPLICATIONS
s Battery Powered Systems
s Cellular Telephones
s Pagers
s Personal Communications Equipment
s Portable Instrumentation
s Portable Consumer Equipment
s Radio Control Systems
s Toys
s Low Voltage Systems
TK112
A
Voltage Code
Package Code
Tape/Reel Code
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
(SOT-23L)
TB : Tape Bottom
(SOT-89-5)
PACKAGE CODE
M: SOT-23L
U: SOT-89-5
ORDERING INFORMATION
VOLTAGE CODE
20 = 2.0 V*
21 = 2.1 V
22 = 2.22 V*
25 = 2.5 V*
28 = 2.8 V*
29 = 2.9 V
30 = 3.0 V*
31 = 3.1 V*
33 = 3.3 V*
35 = 3.5 V*
36 = 3.6 V
38 = 3.8 V
40 = 4.0 V*
42 = 4.2 V
45 = 4.5 V*
48 = 4.8 V*
49 = 4.9 V
50 = 5.0 V*
55 = 5.5 V
* Indicates voltage is available in a SOT-89-5 package.
BLOCK DIAGRAM
S
S
S
S
S
S
S
S
S
S
S
VOUT
GND
+
BANDGAP
REFERENCE
THERMAL
PROTECTION
+
S
NOISE BYPASS
S
S
S
S
S
S
VIN
CONTROL
S
S
TK112XXA
P50
1
3
CONTROL
GND
6
4
VIN
V
OUT
TK112xxA • PO
2
5
GND
NOISE
BYPASS
1
3
6
4
2
5
VOUT
GND
NOISE
BYPASS
GND
CONTROL
VIN
DESCRIPTION
The TK112xxA is a low dropout linear regulator with a built-
in electronic switch. The internal switch can be controlled
by TTL or CMOS logic levels. The device is in the ON state
when the control pin is pulled to a logic high level. An
external capacitor can be connected to the noise bypass
pin to lower the output noise level to 30
µVrms.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 70 mV (typ.) at 30 mA load current. The
TK112xxA has a very low quiescent current of 180
µA at no
load and 1 mA with a 30 mA load. The standby current is
typically 100 nA. The internal thermal shutdown circuitry
limits the junction temperature to below 150
°C. The load
current is internally monitored and the device will shutdown
in the presence of a short circuit or overcurrent condition at
the output.
The TK112xxA is available in either 6 pin SOT-23L or 5 pin
SOT-89-5 surface mount packages.


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